2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
64 #ifndef OPENSSL_NO_ENGINE
65 #include <openssl/engine.h>
67 #include "asn1_locl.h"
70 typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);
71 STACK *app_pkey_methods = NULL;
73 extern EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth, ec_pkey_meth;
75 static const EVP_PKEY_METHOD *standard_methods[] =
83 static int pmeth_cmp(const EVP_PKEY_METHOD * const *a,
84 const EVP_PKEY_METHOD * const *b)
86 return ((*a)->pkey_id - (*b)->pkey_id);
89 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
91 EVP_PKEY_METHOD tmp, *t = &tmp, **ret;
96 idx = sk_find(app_pkey_methods, (char *)&tmp);
98 return (EVP_PKEY_METHOD *)
99 sk_value(app_pkey_methods, idx);
101 ret = (EVP_PKEY_METHOD **) OBJ_bsearch((char *)&t,
102 (char *)standard_methods,
103 sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *),
104 sizeof(EVP_PKEY_METHOD *),
105 (int (*)(const void *, const void *))pmeth_cmp);
111 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
114 const EVP_PKEY_METHOD *pmeth;
117 if (!pkey || !pkey->ameth)
119 id = pkey->ameth->pkey_id;
121 /* Try to find an ENGINE which implements this method */
126 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
131 e = ENGINE_get_pkey_meth_engine(id);
133 /* If an ENGINE handled this method look it up. Othewise
134 * use internal tables.
138 pmeth = ENGINE_get_pkey_meth(e, id);
140 pmeth = EVP_PKEY_meth_find(id);
144 EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
148 ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
153 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
158 ret->operation = EVP_PKEY_OP_UNDEFINED;
162 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
167 if (pmeth->init(ret) <= 0)
169 EVP_PKEY_CTX_free(ret);
177 EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
179 EVP_PKEY_METHOD *pmeth;
180 pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
185 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
190 pmeth->paramgen_init = 0;
192 pmeth->keygen_init = 0;
194 pmeth->sign_init = 0;
196 pmeth->verify_init = 0;
198 pmeth->verify_recover_init = 0;
199 pmeth->verify_recover = 0;
200 pmeth->signctx_init = 0;
202 pmeth->verifyctx_init = 0;
203 pmeth->verifyctx = 0;
204 pmeth->encrypt_init = 0;
206 pmeth->decrypt_init = 0;
208 pmeth->derive_init = 0;
216 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
218 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
222 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
224 return int_ctx_new(pkey, e, -1);
227 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
229 return int_ctx_new(NULL, e, id);
232 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
235 if (!pctx->pmeth || !pctx->pmeth->copy)
237 #ifndef OPENSSL_NO_ENGINE
238 /* Make sure it's safe to copy a pkey context using an ENGINE */
239 if (pctx->engine && !ENGINE_init(pctx->engine))
241 EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
245 rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
249 rctx->pmeth = pctx->pmeth;
250 #ifndef OPENSSL_NO_ENGINE
251 rctx->engine = pctx->engine;
255 CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
257 rctx->pkey = pctx->pkey;
260 CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
262 rctx->peerkey = pctx->peerkey;
265 rctx->app_data = NULL;
266 rctx->operation = pctx->operation;
268 if (pctx->pmeth->copy(rctx, pctx) > 0)
271 EVP_PKEY_CTX_free(rctx);
276 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
278 if (app_pkey_methods == NULL)
280 app_pkey_methods = sk_new((sk_cmp_fn_type *)pmeth_cmp);
281 if (!app_pkey_methods)
284 if (!sk_push(app_pkey_methods, (char *)pmeth))
286 sk_sort(app_pkey_methods);
290 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
292 if (ctx->pmeth && ctx->pmeth->cleanup)
293 ctx->pmeth->cleanup(ctx);
295 EVP_PKEY_free(ctx->pkey);
297 EVP_PKEY_free(ctx->peerkey);
298 #ifndef OPENSSL_NO_ENGINE
300 /* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
301 * functional reference we held for this reason. */
302 ENGINE_finish(ctx->engine);
307 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
308 int cmd, int p1, void *p2)
311 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
313 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
316 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
319 if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
321 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
325 if ((optype != -1) && !(ctx->operation & optype))
327 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
331 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
334 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
340 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
341 const char *name, const char *value)
343 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
345 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
346 EVP_R_COMMAND_NOT_SUPPORTED);
349 if (!strcmp(name, "digest"))
352 if (!value || !(md = EVP_get_digestbyname(value)))
354 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
355 EVP_R_INVALID_DIGEST);
358 return EVP_PKEY_CTX_set_signature_md(ctx, md);
360 return ctx->pmeth->ctrl_str(ctx, name, value);
363 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
365 return ctx->operation;
368 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
370 ctx->keygen_info = dat;
371 ctx->keygen_info_count = datlen;
374 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
379 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
384 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
389 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
391 ctx->app_data = data;
394 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
396 return ctx->app_data;
399 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
400 int (*init)(EVP_PKEY_CTX *ctx))
405 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
406 int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
411 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
412 void (*cleanup)(EVP_PKEY_CTX *ctx))
414 pmeth->cleanup = cleanup;
417 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
418 int (*paramgen_init)(EVP_PKEY_CTX *ctx),
419 int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
421 pmeth->paramgen_init = paramgen_init;
422 pmeth->paramgen = paramgen;
425 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
426 int (*keygen_init)(EVP_PKEY_CTX *ctx),
427 int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
429 pmeth->keygen_init = keygen_init;
430 pmeth->keygen = keygen;
433 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
434 int (*sign_init)(EVP_PKEY_CTX *ctx),
435 int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
436 const unsigned char *tbs, size_t tbslen))
438 pmeth->sign_init = sign_init;
442 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
443 int (*verify_init)(EVP_PKEY_CTX *ctx),
444 int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
445 const unsigned char *tbs, size_t tbslen))
447 pmeth->verify_init = verify_init;
448 pmeth->verify = verify;
451 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
452 int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
453 int (*verify_recover)(EVP_PKEY_CTX *ctx,
454 unsigned char *sig, size_t *siglen,
455 const unsigned char *tbs, size_t tbslen))
457 pmeth->verify_recover_init = verify_recover_init;
458 pmeth->verify_recover = verify_recover;
461 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
462 int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
463 int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
466 pmeth->signctx_init = signctx_init;
467 pmeth->signctx = signctx;
470 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
471 int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
472 int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
475 pmeth->verifyctx_init = verifyctx_init;
476 pmeth->verifyctx = verifyctx;
479 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
480 int (*encrypt_init)(EVP_PKEY_CTX *ctx),
481 int (*encrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
482 const unsigned char *in, size_t inlen))
484 pmeth->encrypt_init = encrypt_init;
485 pmeth->encrypt = encrypt;
488 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
489 int (*decrypt_init)(EVP_PKEY_CTX *ctx),
490 int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
491 const unsigned char *in, size_t inlen))
493 pmeth->decrypt_init = decrypt_init;
494 pmeth->decrypt = decrypt;
497 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
498 int (*derive_init)(EVP_PKEY_CTX *ctx),
499 int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
501 pmeth->derive_init = derive_init;
502 pmeth->derive = derive;
505 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
506 int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
507 int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
510 pmeth->ctrl_str = ctrl_str;